Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
--- Content provided by FirstRanker.com ---
BE - SEMESTER-VI (OLD) EXAMINATION - WINTER 2018Subject Code:160906 Date: 27/11/2018
Subject Name: Theory of Electromagnetics
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
--- Content provided by FirstRanker.com ---
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
- Symbols have their usual meanings
Q.1
--- Content provided by FirstRanker.com ---
(a) Discuss cylindrical and spherical co-ordinate systems 7
(b) Given vectors A = 2ax + 4ay + 10az and B =-5ax + 1ay — 3az, do the following 7
(1) Convert B into cartesian system at (5,0,2) and then find A+B
(ii) Find the angle between A and B at P
(iii) Find the scalar component of A along B at P
--- Content provided by FirstRanker.com ---
Q.2
(a) Explain Coulomb’s law. Using this law find the vector force on 0.7 mC charge at (2,3,6) due to 4.9 uC charge located at (0,0,0) 7
(b) Derive the expression for electric field intensity due to continuous sheet charge 7
OR
(b) A sheet charge of ps = 2 nC/m2 is present at x = 3 in free space and a line charge pL =20nC/m is located at x = 1, z = 4. Find (i) the magnitude of electric field intensity at the origin (i) E at (4,5,6) 7
--- Content provided by FirstRanker.com ---
Q.3
(a) Derive differential or point form of Gauss’ law and hence state divergence theorem 7
(b) Discuss how Coulomb’s Torsional balance can be used to measure small forces 7
OR
Q.3
--- Content provided by FirstRanker.com ---
(a) Define potential and potential difference. Explain how potential difference between two points can be found out due to infinite line charge 7
(b) Derive the expression for ‘electric and potential fields due to electric dipole 7
Q.4
(a) Discuss boundary conditions for perfect dielectric materials 7
(b) What is capacitance? Explain how capacitance can be found out for parallel plate capacitor ? 7
--- Content provided by FirstRanker.com ---
OR
Q.4
(a) Discuss Poisson’s and Laplace’s equations 7
(b) With the help of neat diagram explain the working of electrostatic precipitator 7
Q.5
--- Content provided by FirstRanker.com ---
(a) Prove that V x H = J for steady magnetic fields 7
(b) Explain Maxwell’s equations in integral and point form 7
OR
Q.5
(a) Write a short notes on any two from the following 7
--- Content provided by FirstRanker.com ---
(1) Watt Hour meter (ii) Magnetic levitation (iii) Induction heating
(b) What is FDM? List out the steps for solving differential equations using FDM 7
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University